Have you heard of QThru? If not, welcome to the club - before tonight, I didn't even know it existed. Basically, it's a cool take on self-checkouts at brick-and-mortar stores. The idea is simple: carry your phone around, scanning barcodes of the stuff you intend on buying. Once you're finished, head over to the QThru kiosk and use it to scan the QR on your phone, essentially closing the transaction. All of your credit card info is stored within the QThru app on your device, so once you've scanned the QR, you're done.